Bearing grinder



5, 1932. i E, H|| W|G 1,839,557

BEARING GRINDER Filed March 3l, 1928 me/nto@ Edward HIJA/? Patented dan. v5, 1932 entran stares EDWARD nnuaire, er eLAnKs sia-Enit, PENNSYLVANIA n BEARING GRNDER y Application led. March 31, (1928.; Serial No. 26S,38 0.

This invention relates to improvements inV grinding devices Jfor bearings and thelilre.

An object of this invention is to provide a i bearing` grinder which may be readily adapted for use in the grinding of bearings for automobiles and the like.

A further objectoif this invention is to provide a bearing grinder which may be adjusted to various sizes of bearings.

Other objects of this invention will ap pear Jirom the following detailed Adescription of the device and as disclosed in the single sheet of drawings which is herewith made a a roll member l, made of any suitable ma- Y terial such as steel, and a sheet of flexible abrasive such as-sand paper or emery cloth 2 being adapted to be brought under tension' around the roll by means of a suitably formed clamping member, made of sheet spring steel or the like bent upon itself centrally into a substantially cylindrical part 3 and then Vinto outwardly diverging wing parts 9 and 10. A tension bolt 4 having a head end 5, and a wing nut 6, is provided, the shank portion or' the tension bolt 4 extending through suitable openings .7 and 8 in the divergent wing sections 9 and 10 of the clamping member, and in the upwardly extending portions 1l and l2 of the sand paper or emery cloth 2, in such a manner that when the wing nut 6 the clamping member, the sand paper or emery cloth 2 will be brought under tension firmly around a large proportion of the cir-L cumference of the roll l.

'1" is brought under tension against the down* Y wardly extending wing portions 9 and 10 of e The bearing grinder above described and claimel herewith may be used in any adaptable manner, par icularly for grinding the bearings of automobiles, as Clearly'noted in Fig. l, whereinthe grinding roll l and 2, 5t is-disclosed in operative relationship with a Babbitt bearing'l.V Y

Usually, Babbitt bearings are supplied somewhat smaller than the spindle or shaft members which are intended to be supported ou therein, and are provided that way so that theymay be ground to nt the shafts. The ordinary bearing grinder at present in common use is ineiiicient'and tends to scrape outy thebea-rings and injure the linings or the surfaces thereof. Furthermore, new bearings are not true to form, as a rule, and this inventionprovides a bearing grinder which may be easily adjusted to the requirements of various diameters of bearings. im

The roll 1 may be easilyreplaced by avroll or supporting member or'the sand paper 0r emery cloth 2, of any desirable diameter for itting the bea-ring, as shown in Fig. l. The shank or clamping portion 8 of the grinder 715 kis readily grasped by a hand or other source ot power andthe grinding surface 2 is readily moved back and forth until the bearing is large enough for receiving the shaft. ln this manner the bearing when completed will be Si) perfectly true, and the work of grinding is accomplished more easily and speedilyr than by the ordinary methods.

It is to be understood that substitutions and alterations may be made in the specic-ations B5 and the drawingsV within the scope oi' the appended claims, without affecting the merits of this invention.

lhat I claim is:

l. A bearing grinder comprising a flexible *au sheet of abrasive, a rform member and a clamping member consisting of a sheet of resilient metal bentupon itself centrally into substantially cylindrical form and then into two outwardly diverging wing parts, and means for drawing said wing parts together whereby the vparts of said wings adjacent the ycylindrical part of the clamp will grip the A edges of the sheet positioned therebetween l and the edges of said wings will exert tension 100 on parts of said sheet substantially as specified. v A

2. A bearing grinder comprising a forni, a sheet of flexible abrasive positioned around the form with its ends extending side by side away from the form, means for gripping the edges of the sheet remote frein the form, means for applying inward pressure to the parts of the sheet intermediate the gripped edges thereof and the form to draw them togethentightening theml around they form and tensioning the sheet.

3. A bearing grinder Comprising a form, a

sheet of flexible abrasive positioned around the form with its ends extending side by side awa-y from the form, members gripping the Y outwardly extending parts .of the sheet remote kfrom the ferm and in Contact with the said,parts between the forni and the gripped portions, means for drawing said members together to grip the remote edges of the sheet and apply tension to the sheet on the form.

4. A bearing grinder comprising a forni, a sheetof abrasive material wrapped partially around said form and having end portions extending in substantially the same direction away from said form7 a pair of members ein` bracing' said end portions and hingedly oonnected together at their outer ends, means spaced from the form for securing the end portions of the sheet between said Ymembers to keep said end portions from slipping endN Y wise, and for` drawing the inner ends of the members together to place the sheet under tension. Y

A In testimony whereof I aiiix my signature.

- EDWARD HILWIG. 

